---
cve: "CVE-2026-83613"
severity: "HIGH"
cvss: 8.7
epss: "34%"
vendor: "xmldom"
kev: false
exploited: false
published: "2026-09-01 15:17:39"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T05:11:25+02:00"
---

# CVE-2026-83613

> 8.7 HIGH · 🧪 PoC

## Beschreibung

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, DOMHandler.startElement in lib/dom-parser.js inserts every parsed attribute through setAttributeNode, while NamedNodeMap.setNamedItem in lib/dom.js calls the linear getNamedItem or getNamedItemNS lookup for each insertion. A well-formed element with many distinct attributes therefore requires quadratic comparisons during DOMParser.parseFromString() and can stall a Node.js event loop before application validation. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 0af8cf829d8a92bbac612903422c6947f5458f06 (Commit)
- b5b8fb5b579ae1183b34e74b3bc39d7eb50a226a (Commit)

## Referenzen

- <https://github.com/xmldom/xmldom/security/advisories/GHSA-8344-3jmq-59r6>
- <https://github.com/xmldom/xmldom/pull/1071>
- <https://github.com/xmldom/xmldom/pull/1072>
- <https://github.com/xmldom/xmldom/commit/2c548f200cfec991cd5846627ef8f03542309213>
- <https://github.com/xmldom/xmldom/commit/cfb09b5dbeb035fdfedc9f01e2bbaf226bf47cf3>
- <https://github.com/xmldom/xmldom/releases/tag/0.8.15>
- <https://github.com/xmldom/xmldom/releases/tag/0.9.12>
- <https://github.com/xmldom/xmldom/security/advisories/GHSA-27p8-2357-5qqv>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-83613) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_